BCL2 and B-cell chronic lymphocytic leukemia: As in the case of the previous experiments with primary CLL cells, the Bcl-2-protein levels of our DLBCL collection were analyzed by immunoblotting (Supplementary Fig. 2B), normalized to the Bcl-2-protein level in SU-DHL-4 (Fig. 2b, left panel), and correlated with the LD50 values (Fig. 2b, right panel).